amazon web services - AWS: Price Calculation with AWS Price List API using java -

i want calculate total price each instance types. 

step1) @ first getting ec2 reservation data:

    describereservedinstancesrequest describereservedinstancesrequest= new describereservedinstancesrequest().withfilters(new linkedlist<filter>());     describereservedinstancesrequest.getfilters().add(new filter().withname("state").withvalues("active"));     describereservedinstancesresult describereservedinstancesresult = ec2.describereservedinstances(describereservedinstancesrequest);      describereservedinstancesresult.getreservedinstances() gives me reserve instance. for(reservedinstances reservedinstances : describereservedinstancesresult.getreservedinstances()){                 ec2resdata ec2resdata = new ec2resdata();                 ec2resdata.setavailabilityzone(reservedinstances.getavailabilityzone());                 ec2resdata.setinstancecount(reservedinstances.getinstancecount());                 ec2resdata.setinstancetenancy(reservedinstances.getinstancetenancy());                 ec2resdata.setinstancetype(reservedinstances.getinstancetype());                 ec2resdata.setproductdescription(reservedinstances.getproductdescription());                 ec2resdata.setresinstanceid(reservedinstances.getreservedinstancesid());                 ec2resdata.setwindows(reservedinstances.getproductdescription().tolowercase().indexof("windows") != -1);                 ec2resdata.setinstancename(getname(reservedinstances.gettags()));                 instancetypeindex.add(reservedinstances.getinstancetype());                 ec2resdata.setvpc(reservedinstances.getproductdescription().tolowercase().indexof("vpc") != -1);                 ec2resdatalist.add(ec2resdata);             } 

step2) after getting ec2data

describeinstancesrequest describeinstancesrequest = new       describeinstancesrequest().withfilters(new linkedlist<filter>());     describeinstancesrequest.getfilters().add(new filter().withname("instance-state-name").withvalues("running"));     list<reservation> listreservation = ec2.describeinstances(describeinstancesrequest).getreservations();     set<instance> instances = new hashset<instance>();             (reservation reservation : listreservation) {                 instances.addall(reservation.getinstances());             }             if (formatmanager.isfilled(instances)) {                 ec2datalist = new arraylist<ec2data>();                 (instance instance : instances) {                     ec2data ec2data = new ec2data();                     ec2data.setinstanceid(instance.getinstanceid());                     ec2data.setinstancetype(instance.getinstancetype());                     ec2data.setcurrentstate(instance.getstate().getname());                     ec2data.setavailabilityzone(instance.getplacement().getavailabilityzone());                     list<tag> listtag = instance.gettags();                     ec2data.setinstancename(getname(listtag));                     if(formatmanager.isfilled(instance.getplatform())){                         ec2data.setwindows(instance.getplatform().tolowercase().equals("windows"));                     }                     else{                         ec2data.setwindows(false);                     }                     instancetypeindex.add(instance.getinstancetype());                     ec2data.setvpc(formatmanager.isfilled(instance.getvpcid()));                     ec2datalist.add(ec2data);                 }             } 

step3) after combine both reservation data , ec2 data (with unique combo of instance type, availability zone, windows, , vpc), have calculated reservation count, total number of running instances. (http://awsresco.s3-website-us-east-1.amazonaws.com/)

now need calculate price instances.

i have gone through link https://aws.amazon.com/blogs/aws/new-aws-price-list-api/.

step4) use of https://pricing.us-east-1.amazonaws.com/offers/v1.0/aws/index.json need separate product information , pricing information. have used location product attributes find sku needed calculate prices for.

fileinputstream fileinputstream = new fileinputstream("c:/index.json");     string responsestring = formatmanager.frominputstreamtostring(fileinputstream,"utf-8");     org.json.simple.jsonobject jsonobject = getjsonobject(responsestring);     org.json.simple.jsonobject products = getjsonobject("products",jsonobject);     set<map.entry<?,?>> entryset = products.entryset();  (map.entry<?,?> entry : entryset) {                 string sku = getjsonkey(entry);                 org.json.simple.jsonobject productitem = getjsonobject(sku,products);                 org.json.simple.jsonobject attributes = getjsonobject("attributes",productitem);                 string instancetype = getstring("instancetype",attributes);                 string location = getstring("location",attributes);                 string operatingsystem = getstring("operatingsystem",attributes);                 string tenancy = getstring("tenancy",attributes);                 string preinstalledsw = getstring("preinstalledsw",attributes);                 string licensemodel = getstring("licensemodel",attributes);                   //system.out.println("operatingsystem '"+operatingsystem+"' - preinstalledsw '"+preinstalledsw+"'");                  //system.out.println("location '"+location+"' - instancetype '"+instancetype+"'"+" - "+instancetypeindex);                 string targetlocation = "us west (oregon)";                 if (targetlocation.equals(location)){                     if (!skuindexbyinstancetype.containskey(instancetype)){                         skuset.add(sku);                         if (instancetypeindex.contains(instancetype)){                             //we interested on instancetype                             skuindexbyinstancetype.put(instancetype,entry);                             skuinstancetypemap.put(sku, instancetype);                             instancetypeskumap.put(instancetype, sku);                         }                         else {                             //we not interested on instance type                         }                     }                     else {                         map.entry<?,?> entryprevious = skuindexbyinstancetype.get(instancetype);                         throw new servicefatalexception("instancetype '"+instancetype+"' duplicated location '"+location+"'. here entryprevious '"+entryprevious+"' , entry '"+entry+"'");                     }                 }                 else {                  }             } 

here confused 1 sku has many instance type. instance type need consider when calculating price? how differentiate instance type in step4 of step1 , step2.